A tamper-proof padlock box which locks a door to a door frame that ensures that only users with a specialized key can access and open an internal lock. The tamper-proof padlock box includes a guard lock box, a padlock, and a key-receiving track mechanism. The padlock includes a U-shaped shank and a locking body. The guard lock box includes a tubular body, a bottom, a removable top, and a staple-receiving hole. The removable top is slidably mounted to the tubular body and supports the padlock. The U-shaped shank is rotatably mounted to the removable top about a leg of the U-shaped shank. The leg is oriented normal to the removable top. The staple-receiving hole allows a padlock staple access to the padlock and normally traverses through a rear sidewall. The key-receiving track mechanism is mechanically integrated into the bottom.

A tamper-proof padlock box which locks a door to a door frame that ensures that only users with a specialized key can access and open an internal lock. The tamper-proof padlock box includes a guard lock box, a padlock, and a key-receiving track mechanism. The padlock includes a U-shaped shank and a locking body. The guard lock box includes a tubular body, a bottom, a removable top, and a staple-receiving hole. The removable top is slidably mounted to the tubular body and supports the padlock. The U-shaped shank is rotatably mounted to the removable top about a leg of the U-shaped shank. The leg is oriented normal to the removable top. The staple-receiving hole allows a padlock staple access to the padlock and normally traverses through a rear sidewall. The key-receiving track mechanism is mechanically integrated into the bottom.

The protector includes a box-like metal housing formed of first and second housing parts connected by a spring-loaded hinge for movement between an open position, in which a seal associated with the vehicle cargo compartment door handle is exposed, and a closed position, in which the seal cannot be accessed. At least one of the housing parts is hollow and configured to accommodate the handle such that when the housing parts are in the closed position the seal is fully enclosed. A padlock may be used to lock the housing parts in the closed position such that the seal cannot be accidentally broken falsely indicating that the cargo compartment door has been opened during transit.